Johnson Controls A19AAT-2 20-80F Temperature Control

The Johnson Controls A19AAT-2 is a robust mechanical temperature control designed specifically for portable cooling applications and temporary climate control setups. This SPST (Single Pole Single Throw) controller features an Open Low action, making it an ideal solution for cycling refrigeration or air conditioning equipment to maintain precise environment levels. Operating on 120Vac, the unit offers a setpoint range of 20 to 80 degrees F with a 3.5 degree F fixed differential, ensuring consistent performance without constant short-cycling. The inclusion of a 6' capillary tube and remote sensing bulb allows for flexible placement, while the piggyback style plug on the 6' extension cord enables simple series connection with the cooling load. Designed for ease of use in the field, this Johnson Controls A19 series control includes a knob range adjuster and a chain mount for rapid installation in diverse mechanical environments.

• Universal Compatibility: The 120V piggyback plug allows for easy integration with standard portable AC units and cooling fans.
• Reliable Sensing: The 6-foot copper capillary provides accurate remote temperature monitoring away from the control body.
• Industrial Build: Features a rugged design with automatic reset functionality for unattended operation.
• Precise Control: The fixed differential prevents rapid equipment cycling, extending the lifespan of compressors and motors.

Commonly Asked Questions

How do I install the A19AAT-2 for portable cooling?
The unit is designed for "plug-and-play" operation. Use the included chain mount to hang the control, place the remote bulb in the return air stream, and plug your cooling device into the piggyback cord connector before plugging the connector into a standard 120V outlet.

Can this control be used for heating applications?
No, this specific model is configured for Open Low operation, meaning it breaks the circuit on a temperature drop, which is standard for cooling. Heating applications typically require an Open High configuration.

Is the differential adjustable on this model?
The A19AAT-2 features a fixed differential of 3.5 degrees Fahrenheit. For applications requiring an adjustable differential, a different model within the A19 series would be required.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.